Cornerstone Standards Council

Quarry rock face with green grass, trees and blue sky

The seven principles that are the foundation for the Cornerstone certification are consistent with the way Dufferin Aggregates has operated its sites for many years, and we believe, an important mechanism towards ensuring a sustainable future. We are proud our Acton Quarry was the first site to be certified as socially and environmentally responsible by the Cornerstone Standards Council and remain committed to applying for certification for the Paris Pit and our other Dufferin Aggregates operations.